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-rw-r--r--Objects/floatobject.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index 7e78132..92faa7c 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -1463,8 +1463,8 @@ float_fromhex(PyTypeObject *type, PyObject *string)
bits lsb, lsb-2, lsb-3, lsb-4, ... is 1. */
if ((digit & half_eps) != 0) {
round_up = 0;
- if ((digit & (3*half_eps-1)) != 0 ||
- (half_eps == 8 && (HEX_DIGIT(key_digit+1) & 1) != 0))
+ if ((digit & (3*half_eps-1)) != 0 || (half_eps == 8 &&
+ key_digit+1 < ndigits && (HEX_DIGIT(key_digit+1) & 1) != 0))
round_up = 1;
else
for (i = key_digit-1; i >= 0; i--)